package com.tanhua.dubbo.api;

import cn.hutool.core.util.ObjectUtil;
import com.tanhua.model.enums.CommentSubject;
import com.tanhua.model.enums.CommentType;
import com.tanhua.model.mongo.Comment;
import com.tanhua.model.mongo.Movement;
import com.tanhua.model.mongo.Video;
import org.apache.dubbo.config.annotation.DubboService;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.FindAndModifyOptions;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;

import java.util.List;

@DubboService
public class CommentApiImpl implements CommentApi {

    @Autowired
    private MongoTemplate mongoTemplate;

    //发布评论，并获取评论数量
    @Override
    public Integer save(Comment comment, CommentSubject commentSubject) {
        Long publishUserId = null;
        //1、根据不同的评论主体类型，去相应主体表中查得主体发布人ID
        switch (commentSubject) {
            case MOVEMENT: {
                Movement movement = mongoTemplate.findById(comment.getPublishId(), Movement.class);
                if (ObjectUtil.isNotEmpty(movement)) {
                    publishUserId = movement.getUserId();
                }
                break;
            }
            case COMMENT: {
                Comment parentComment = mongoTemplate.findById(comment.getPublishId(), Comment.class);
                if (ObjectUtil.isNotEmpty(parentComment)) {
                    publishUserId = parentComment.getUserId();
                }
                break;
            }
            case VIDEO: {
                Video video = mongoTemplate.findById(comment.getPublishId(), Video.class);
                if (ObjectUtil.isNotEmpty(video)) {
                    publishUserId = video.getUserId();
                }
                break;
            }
            default:
                break;
        }
        //2、设置主体发布人ID
        comment.setPublishUserId(publishUserId);
        comment.setCreated(System.currentTimeMillis());
        //3、保存到数据库
        mongoTemplate.save(comment);
        //4、更新动态表中的对应字段
        Query query = Query.query(Criteria.where("id").is(comment.getPublishId()));
        Update update = new Update();

        if (comment.getCommentType() == CommentType.LIKE.getType()) {
            update.inc("likeCount", 1);
        } else if (comment.getCommentType() == CommentType.COMMENT.getType()) {
            update.inc("commentCount", 1);
        } else {
            update.inc("loveCount", 1);
        }
        //设置更新参数
        FindAndModifyOptions options = new FindAndModifyOptions();
        options.returnNew(true);//获取更新后的最新数据

        Integer count = null;
        switch (commentSubject) {
            case MOVEMENT: {
                Movement movementResult = mongoTemplate.findAndModify(query, update, options, Movement.class);
                count = movementResult.statisCount(comment.getCommentType());
                break;
            }
            case COMMENT: {
                Comment commentResult = mongoTemplate.findAndModify(query, update, options, Comment.class);
                count = commentResult.getLikeCount();
                break;
            }
            case VIDEO: {
                Video videoResult = mongoTemplate.findAndModify(query, update, options, Video.class);
                count = videoResult.statisCount(comment.getCommentType());
                break;
            }
            default:
                break;
        }

        //5、获取最新的评论数量，并返回
        return count;
    }

    //分页查询
    @Override
    public List<Comment> findComments(String movementId, CommentType commentType, Integer page, Integer pagesize) {
        //1、构造查询条件
        Query query = Query.query(Criteria.where("publishId").is(new ObjectId(movementId)).and("commentType")
                .is(commentType.getType()))
                .skip((page - 1) * pagesize)
                .limit(pagesize)
                .with(Sort.by(Sort.Order.desc("created")));
        //2、查询并返回
        return mongoTemplate.find(query, Comment.class);
    }

    //判断comment数据是否存在
    @Override
    public Boolean hasComment(String subjectId, Long userId, CommentType commentType) {
        Criteria criteria = Criteria.where("userId").is(userId)
                .and("publishId").is(new ObjectId(subjectId))
                .and("commentType").is(commentType.getType());
        Query query = Query.query(criteria);
        return mongoTemplate.exists(query, Comment.class); //判断数据是否存在
    }

    //删除
    @Override
    public Integer delete(Comment comment,CommentSubject commentSubject) {
        //1、删除Comment表数据
        Criteria criteria = Criteria.where("userId").is(comment.getUserId())
                .and("publishId").is(comment.getPublishId())
                .and("commentType").is(comment.getCommentType());
        Query query = Query.query(criteria);
        mongoTemplate.remove(query, Comment.class);
        //2、修改动态表中的总数量
        Query movementQuery = Query.query(Criteria.where("id").is(comment.getPublishId()));
        Update update = new Update();
        if (comment.getCommentType() == CommentType.LIKE.getType()) {
            update.inc("likeCount", -1);
        } else if (comment.getCommentType() == CommentType.COMMENT.getType()) {
            update.inc("commentCount", -1);
        } else {
            update.inc("loveCount", -1);
        }
        //设置更新参数
        FindAndModifyOptions options = new FindAndModifyOptions();
        options.returnNew(true);//获取更新后的最新数据

        Integer count = null;
        switch (commentSubject) {
            case MOVEMENT: {
                Movement movementResult = mongoTemplate.findAndModify(movementQuery, update, options, Movement.class);
                count = movementResult.statisCount(comment.getCommentType());
                break;
            }
            case COMMENT: {
                Comment commentResult = mongoTemplate.findAndModify(movementQuery, update, options, Comment.class);
                count = commentResult.getLikeCount();
                break;
            }
            case VIDEO: {
                Video videoResult = mongoTemplate.findAndModify(movementQuery, update, options, Video.class);
                count = videoResult.statisCount(comment.getCommentType());
                break;
            }
            default:
                break;
        }
        return count;
    }
}
